Doowia dexterae Barnard & Drummond, 1987

Hughes, L. E., 2009, Paracalliopiidae *, Zootaxa 2260 (1), pp. 759-765: 759-762

publication ID

http://doi.org/ 10.11646/zootaxa.2260.1.41

persistent identifier

http://treatment.plazi.org/id/03D787F1-FFE1-FF8A-D4C5-F8945C68F970

treatment provided by

Felipe

scientific name

Doowia dexterae Barnard & Drummond, 1987
status

 

Doowia dexterae Barnard & Drummond, 1987  

( Figs 1 View FIGURE 1 , 2 View FIGURE 2 )

Doowia dexterae Barnard & Drummond, 1987:123   , figs 5–6. — Lowry & Stoddart, 2003: 205 (catalogue). Material examined. Male, dissected, 3.4 mm, 3 slides, AM P77831 View Materials (QLD 36); female, dissected, 3.5 mm, 2 slides AM P77832 View Materials (QLD 36); 67 specimens, AM P27189 View Materials (PS 2-2); many specimens, AM P27188 View Materials (PS 2-2); many specimens, AM P28479 View Materials (QLD 36); 16 specimens, AM P25537 View Materials (PS 2-5); 15 specimens, AM P25538 View Materials (PS 22.5-1); 50 unsexed, AM P77833 View Materials (SEL/LZI 5-1).

Type locality. Redcliffe Beach , near Brisbane, Queensland, Australia (27º14’S 150º07’E) GoogleMaps   .

Description. Based on male, 3.4 mm, AM P77831 View Materials .

Head. Head lateral cephalic lobe absent. Eyes ovoid, adpressed at top of head. Antenna 1 peduncle article 1 subequal to article 2, subequal to article 3; article 2 subequal to article 3; flagellum with 4 articles; accessory flagellum absent. Antenna 2 flagellum with 12 articles. Maxilla 1 inner plate with 1 apical seta, with row of medial setae. Maxilla 2 inner plate with oblique setal row. Mandible palp present; article 1 shorter than article 2, subequal to article 3; article 2 longer than article 3; without basofacial setae; molar triturative; accessory setal row with 5 setae. Lower lip mandibular lobes apically rounded, with extensions directed axially. Maxilliped palp exceeding outer plate.

Pereon. Coxae 1–7 subequal to depth of pereonites. Gnathopod 1 coxa with rounded distal expansion; carpus shorter than propodus; propodus subchelate, not distally expanded; dactylus reaching length of palm. Gnathopod 2 stout; carpus shorter than the propodus, cup-shaped, carpal lobe absent; propodus subchelate, palm subacute, entire, palm lined with robust setae, without robust setae defining posterodistal corner of palm; dactylus reaching length of the palm. Pereopods 3–6 fossorial. Pereopod 7 much longer than pereopods 5–6; basis posterior margin straight, smooth, posterodistal corner rounded, extending part way along ischium.

Pleon. Epimera 2–3 posterodistal corners subquadrate. Urosomites 2–3 fused. Uropod 1 rami subequal in length; inner ramus with 3 robust setae, outer ramus with 1 robust seta. Uropod 2 rami subequal in length; inner ramus with 1 robust seta; outer ramus with 1 robust seta. Uropod 3 peduncle elongate, twice as long as broad; rami subequal in length; rami without robust setae. Telson   subquadrate, with medial setae.

Female (sexually dimorphic characters). Based on female, 3.5 mm, AM P77832 View Materials . Gnathopod 1 carpus longer than propodus, carpal lobe present; propodus twice as long as broad. Gnathopod 2 slender; carpus longer than the propodus, carpus subtriangular, carpal lobe present, lobe about as long as broad; propodus twice as long as broad, palm acute.

Habitat. Sandy beaches, surf zone.

Remarks. Differences between Doowia dexterae   and Doowia cooma Barnard & Drummond, 1987   , the two species of Doowia   described from Australia, are very slight. The GBR material described here is larger than original material of D. dexterae   but has less robust setae on the uropods, a character identified as increasing in number with size. The reduced number of robust setae on the uropods in combination with the 8 oblique setae on the inner plate of maxilla 2 (3 oblique setae in D. dexterae   ) would appear to align the GBR material with D. cooma Barnard & Drummond, 1987   . However, the female GBR material examined has well developed carpal lobes on gnathopods 1–2 as in D. dexterae   (weakly developed in D. cooma   ). The male gnathopod 1 propodus palm in GBR material has a greater number of robust setae as in D. dexterae   . I consider these later two characters to be more important for differentiating D. dexterae   from D. cooma   , and therefore assign the GBR species to D. dexterae   .

Distribution. Australia. Queensland: Redcliffe Beach, near Brisbane ( Barnard & Drummond 1987), South Bribie Island ( Barnard & Drummond 1987), Lizard Island (current study).

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Paracalliopiidae

Genus

Doowia

Loc

Doowia dexterae Barnard & Drummond, 1987

Hughes, L. E. 2009
2009
Loc

Doowia dexterae

Lowry, J. K. & Stoddart, H. E. 2003: 205
Barnard, J. L. & Drummond, M. M. 1987: 123
1987